Basionym Name:Sphaeria improvisa P. Karst., Bidr. Känn. Finl. Nat. Folk 23: 93 (1873)
Homotypic synonyms:Melanomma improvisum (P. Karst.) P. Karst., Not. Sällsk. Fauna et Fl. Fenn. Förh., Ny Ser. 13: 246 (1873)Melanopsamma improvisa (P. Karst.) Sacc., Syll. fung. (Abellini) 1: 579 (1882)Psilosphaeria improvisa (P. Karst.) Cooke, Grevillea 16(no. 78): 50 (1887)Zignoella improvisa (P. Karst.) Sacc., Michelia 2(no. 7): 346 (1881)